If the maximum permissible orbits of elements in nature are limited to n = 4, what are the number of possible elements?

Explanation

To solve the question of how many possible elements exist if the maximum permissible orbits of elements in nature are limited to n = 4, we will follow these steps:

### Step 1: Understand the Principal Quantum Number (n)
The principal quantum number (n) indicates the energy level of an electron in an atom. The question states that the maximum permissible orbit is n = 4.

### Step 2: Determine the Values of the Azimuthal Quantum Number (l)
The azimuthal quantum number (l) can take values from 0 to (n - 1). For n = 4, the possible values of l are:
- l = 0 (s sub-shell)
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